<template>
    <div class="goodsinfo-container">
        <!-- 加入购物车小球动画 -->
        <transition
            @before-enter="beforeEnter"
            @enter="enter"
            @after-enter="afterEnter">
            <div class="ball" v-show="ballflag" ref="ball"></div>
        </transition>
        <!-- 商品轮播图区域 -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <swiper :lunbotulist="goodsimgs" :isfull="false"></swiper>
                </div>
            </div>
        </div>
        <!-- 商品购买区域 -->
        <div class="mui-card">
				<div class="mui-card-header">{{goodsnum.title}}</div>
				<div class="mui-card-content">
					<div class="mui-card-content-inner">
                        <p class="price">市场价钱：<del>￥{{ goodsnum.market_price }}</del>&nbsp;&nbsp;销售价：<span class="now_price">￥{{ goodsnum.sell_price }}</span></p>
                        <p>购买数量：<numbox @getcount="getselectedcount" :max="goodsnum.stock_quantity"></numbox></p>
                        <p>
                            <mt-button type="primary" size="small">立即购买</mt-button>
                            <mt-button type="danger" size="small" @click="ballchange">加入购物车</mt-button>
                            <!-- 按钮属于goodsinfo ，数值属于numbox-->
                        </p>
					</div>
				</div>
			</div>
        <!-- 商品参数区域 -->
        <div class="mui-card">
            <div class="mui-card-header">商品参数</div>
            <div class="mui-card-content">
                <div class="mui-card-content-inner">
                    <p>商品货号：{{ goodsnum.goods_no }}</p>
                    <p>库存情况：{{ goodsnum.stock_quantity }}</p>
                    <p>上架时间：{{ goodsnum.add_time | dateFormat }}</p>
                </div>
            </div>
            <div class="mui-card-footer">
                <mt-button type="primary" plain size="large" @click="godesc(id)">图文介绍</mt-button>
                <mt-button type="danger" plain size="large" @click="gocomment(id)">商品评论</mt-button>
            </div>
		</div>
    </div>
</template>

<script>
import { get } from 'http';
//导入轮播图组件
import swiper from '../subcomponents/swiper.vue';
//导入数字框组件
import numbox from '../subcomponents/goodsinfo_numbox.vue'
export default {
    data () {
        return {
            id: this.$route.params.id,
            goodsimgs:[],//图片数据
            goodsnum:{},//获取数据对象
            ballflag:false,//小球显示
            selectedcount:1,//保存用户选中的购买数量
        }
    },
    created(){
        this.getgoodsnums();
        this.getgoodsimgs();
    },
    methods:{
        getgoodsimgs(){
            this.$http.get("http://www.liulongbin.top:3005/api/getthumimages/" + this.id ).then(result=>{
                if(result.body.status === 0){
                    // 先循环轮播图的每一项，为 item 添加 img 属性 因为 轮播图 组件中 只认识 item.img,不认识 item.src
                    result.body.message.forEach(item => {
                        item.img = item.src;
                    });
                    this.goodsimgs = result.body.message;
                }
            })
        },
        getgoodsnums(){
            this.$http.get("http://www.liulongbin.top:3005/api/goods/getinfo/" + this.id ).then(result=>{
                if(result.body.status === 0){
                    this.goodsnum = result.body.message[0];
                }
            })
        },
        godesc(id){
            this.$router.push({ name:'goodsdesc',params:{ id }});
        },
        gocomment(id){
            this.$router.push({ name:'goodscomment',params:{ id }});
        },
        ballchange(){
            this.ballflag = !this.ballflag;
            //{id:商品id,count:要购买的数量,price:商品购价,selected:true（购买状态）}
            var goodsinfo = {id:this.id,count:this.selectedcount,price:this.goodsnum.sell_price,selected:true};
            this.$store.commit("addtocart",goodsinfo);
        },
        beforeEnter(el){
            el.style.transform="translate(0,0)";
        },
        enter(el,done){
            el.offsetWidth;
            const ballposition = this.$refs.ball.getBoundingClientRect();
            const badgeposition = document.getElementById("badge").getBoundingClientRect();
            const xdist = badgeposition.left - ballposition.left;
            const ydist = badgeposition.top - ballposition.top; 
            el.style.transform = `translate(${xdist}px,${ydist}px)`;
            el.style.transition = 'all 0.5s cubic-bezier(.4,-0.3,1,.68)';
            done();
        },
        afterEnter(el){
            this.ballflag = !this.ballflag;
        },
        getselectedcount(count){
            this.selectedcount = count;
        }
    },
    components:{
        swiper,numbox
    }
}
</script>

<style lang="scss" scoped>
.goodsinfo-container{
    background: #ccc;
    overflow: hidden;


    .now_price{
        color: red;
        font: 16px;
        font-weight: bold;
    }

    .mui-card-footer{
        display: block;
        button{
            margin: 15px 2px;
        }
    }

    .ball{
        width: 15px;
        height: 15px;
        border-radius: 50%;
        background: red;
        position: absolute;
        z-index: 99;
        top: 390px;
        left: 148px;
    }

}

</style>
